Best available copx



BEST AVNLABLE COP.

F. w. MOF FAT ELECTRIC HEATiNG ELEMENT. APPI'JGATIOMHLED JAN. 5,.192 2.

Reissued Oct. 24, 1922 Reissuetl Oct. 24, 1922.

g m mmm UNITED STATES PATENT OFFICE.

FREDERICK W. MOFFAI', OF WESTON; ONTARIO,

CANADA.

ELECTRIC H EATING ELEMENT.

Origins). No. 1,323,084, dat'ed November 25, 1919 Serial N0. 228,228, filed April 12, 1918.

Application for reissue filed January 5. 1922. Serial No. 527,242.

To all whom it may 0071 00191:

Be it known that. I, FREDERICK W. Talonnn, of tho town oflleston, in the county of York, Provhoo of Ontario, LE-ma ls. have ii'iv -nl'ocl certain newaml nsv'l'lii improvenmnts in 'll'iestric Heating Elements, o l

which the iolhnYinq'is a'speciiii-Mimi.-

This invention .ates to heating eimm'nls oi the disk typo in which tho resistance wire is spirally arranged. and (zonm-vtions will: i'lm terminals mqniro to he made at lhe llllfli'i' side ol the rlislt, and .2113: ohjei-l is to lliivisu Till element of this lyfre in'whh-h the minim-lions of llw rosistalwo wiring to the terminal posts are made at, the :unilui siile of tho clisic and in whir-hjhe x'f-sislia'oi'o Wire Smalls (Hill. ihv un'snimilr-r are (-onsplol'el I up to limiz joinls of iooi'oil .vlioroliy :1 :muzimlzm ol pros. tronhlv i-misoil by any li och-Jami .of ills]; is olihiinml.

l. attain. my ohjui-ts by moans of the consii'uviions lulu-i r 'ioi'l 11ml iliiisti'nluilin auw-ompaoymg drawings in \xllivh i is :i ohm VlGW of H10 nmlor side of lhu i'vs' mime van-fixing disk of H1! oli-ol'i'ic limiting i-lomonl (-onstrui-hul in zwvor'linnve with my invention;

g.2 :1 svution of tho lino (1-1 in Fig. l; and

Fig. Ii 21 soorion on the lli'll' (J- /l' in Fig. 1 showing also Lho metal rouloining gum,

in l'lH' ilrzw'iiog s like numerals of role-runco in li 'uliv vol-responding poi-(l4 ii: the (lifim'vnt lijltill'fl. v

i is :1 disk ol. suitable insulating maiw'iui such as r-ommonl v i-mployul in :hu 0-: qr-fifth; lion. ol' vim-iii! hon! iznghhmlclit This dish wound with H sown-221(- gi'oow of the. mentor of ll: ates with a llOli ll (*xlcmling Lhrougrh lo the. hotlom of lhe disk. l-Im-h of lhwlilUlCH commnnivates with :1 ll'wvv l loz'nmrl in lhe under side oi the (lisl; :mrl exlmuliog to n z'evoss'fi :uljmvnl the oclgv (:i' ll .iisk. live or mom in'iilgvs ll :u'v gn'i-i og-uivly formal? over the grooves.

Al, the, outer and of each groove '7 is formed oxiemling throng .sido of the rlisiz. About (m-"n of those in Y -s A hloclc l: m" suilahie is I'ormml n P000554 #4. insulating material is provided will} proslam-v. Cm-h 0 msk vommlznh H hole. E l in lhv unlimjection 10 adapted to fit into the recess a and lo fill the same as exactly as possible consistent with an easy fit. The block is secured in plane hy'means of the terminal 12, passing through both the disk and the block formodgzs a. boil). 7 '..hrongh the block are formed. the holes 13'; through which the .enrls '11 of the resistance Wire are led, secured to the'tor: minai at the under side of the block.

H are blocks, oach )rovided with a pro jeotion 1-5 adapted to i; into one of the re-. onsso 8. Each of these blocks has ll hole therein adapted to aline with the corresponding hole 7} Through these holes the outer emls 16 of the resistance coils are led andm-e connected to the correspondingten minals 37, which :m'a famed as bolts passin through the disk and blocks and holding the latter in place.

ll, will he umlo invention lies a resistance rstood that the essence of in bringing the ends of wiring through the disk and through holes in the blocks 14, at the lower ends of which they are connected to the bolts 17 which not only serve as terminals but also serve to secure the olook 14 in position. It, follmvs therefore that many vaiiations may he made in the specific constructions for bringing the emis of the Wiring'to' the holes in the hlock'wil'hoot departing'from' the spirit of my in' ontion.

The disk is as usual fitted into a-metal pan 1?! containing heat insulating material anal through holes in the hoitom of the an the iorm inal hlm-ks'paSs. See Fig; 3. he (.Hll!!('l;l(flliwhere they lie in'the'gromss l haw Elms always hoon we-ll protected but have mil hwn so well promoted adjacent the lil'lillililll). but it w :e lhat'withlho mosh fi ms rloscr .43 the connectionsof tho lirwlhlzlll 'i wow urn cl'nnplotely protectd (limo-us Illll! points of (nonfiction With fill lonninnls. Ho ihiu, no part can accidently vootzu-L with any flfi-i'li iioilvrnouth the elemlml. in sm'h a way 11s in omlserlanger.

3:. will ho unel z-stoml. of (noise, that the nnmlmr oi 'hv imniino bloolis employed will 60mm! on 11210 :1: of separate re sEslam-o uni only one resistance wire surface of the disk, flvo How-ills necessary. W'ith m 1'! woo-mo circuits :1 larger I lating material adapted BEST AVAlLABLE corn from the same mold so that each block will be provided with two holes for the passage of the conn. tiions though in the case of the blocks 14 on i one is essential.

\Vhat I claim a my invention is 2- 1. In an elect g element, the combination of resistance e, a disk of insuits upper side to receive the resistance wir and al r g HI! opening theretihrough for the passage of an end of the wire to the under side of the disk; a separate block of insulating materialfitting against the lower surface of the disk; :1 bolt passing through the disk and block and serving as a terminal and also as a means to hold the block in place, said block having a hole formed therein through hich h end of the resistance wiring' is led and connected to the bolt below the disk at the low r n f the block.

2. In an electric heating element, th coin bination of resistance wire; a disk 0) infil lating material adapted at its upper side 1. receive the resistance wire and having .3 plurality of openings therethrough for the passage of ends of the resistance wiring to the under side of the disk; a plurality of separate blocks of insulating material fit ting against the under side of the disk towards its outer edge; bolts passing through -.the disks and block serving-as terminals and 'also as means to hold the blocks in place, said which the ends of blocks having holes formed therein through the resistance wiring are led and connected to the bolts below the disk at the lower end of the block,

- 3. In an electric-heating element, the combination of a disk of insulating material adapted at its upper side to receive a resisttwo holes formed therein for the passage of resistance connections to ance and having the underside of the disk, recesses being formed in the underside of the disk 'With which said holes communicate; blocks of insulating material separate from the disk provided with projections adapted to fit into said recesses; terminal bolts passing through the disk and the blocks and serving to secure the latter in place, holes being provided in the blocks alining with the aforesaid holes in the disk and resistance wire carried hination of a disk of insulating material adapted at its upper side to receive a resist ance and having two holes formed therein adjacent its outer edge and two holes at the center for the passage of resistance 'connections to the under side of the disk, recesses being formed in the underside of the disk with which said first mentioned holes communicate; and a. third recess also adjacent the edge communicating with two grooves formed in the underside of the disk and l ading to the central holes; blocks of insulating material separate from the disk provided with projections adapted tri'fit intosaid re? 'cesses; terminal bolts passing through the disk and the blocks and serving to secmethe latter in place, holes being provided in the blocks alining with the aforesaid holes the vilijsk and resistance wire carried at the upper side of the disks having its ends brought down through the holes in the disks and blocks and connected with the terminal bolts at the under side'of the blocks. a

5, an electric heating'element, the'com- .hin on of a disk of insulating material adapted at its upper side to receive a resistance and having cent its outer edge and a hole at the center for the passage of resistance connections to the under side of the disk and. a groove leading from the central hole to apoin-tadjacent the outer edge of the disk; two lilocks'of in:

sulating material separate from the disk its ends brought down through the holes in the disks and blocks and connected with the terminal bolts at the under side of the blocks; Signed at Toronto, Ont., this 16th day of December, 1921.

' FREDERICK w. MOFFAT.

hole, iormed therein adja 

